I need to permit to an Applet to read and write HD files.
All ok with java 1.2, 1.3, 1.4 and 1.5 of Sun.
But when, before signing a verson of my applet written for Internet Explorer
without Java SUN (Microsoft 1.1.4 JVM), I try to insert this:

try
{
 Class s=Class.forName("com.ms.security.PolicyEngine");
 if (s!=null)
  {s.assertPermission(com.ms.security.PermissionID.FILEIO);}
}
catch(Throwable e)
{System.out.println("Error: "+e);}

The result, is, while I compile my applet, the following error:

   package com.ms.security does not exist
   s.assertPermission(com.ms.security.PermissionID.FILEIO);

I try Class p=com.ms.security.PermissionID; and
s.assertPermission(p.FILEIO); instead, but the error is "No variable FILEIO
defined in class java.lang.Class"

How can I do? I have only Sun javac for compile.

N.B.I writed 2 applets, one for SUN 1.4, and the another for Microsoft JVM,
with a javascript that run the correct one in the browser, but only the one
for java Sun works properly.